Device for increasing a force applied by a wrench
A tool comprises a drive gear comprising a hollowed interior portion, including teeth disposed on an inner wall, the drive gear comprising a drive member disposed on a bottom portion of the drive gear, the drive member for applying a first force, an intermediate gear cooperating with the teeth disposed inward, the intermediate gear having a fixed position within the drive gear, and a primary gear disposed within the drive gear, cooperating with the intermediate gear, the primary gear for receiving a second force less than the first force.
1. Field of the Invention
The present invention relates to hand tools, and more particularly to a device to increasing a force applied by the wrench.
2. Discussion of Related Art
Wrenches, such as ratchet wrenches and breaker bars, are used to tighten and loosen nuts, bolts, and other fixation means. When a force needed to tighten or loosen the fixation means is greater than a user is capable of comfortably applying with a given wrench, the user may be unable to accomplish a desired task.
One method for applying the needed force is to implement a longer wrench, thus increasing the amount of force applied to the fixation means for a given amount of force applied to an end of the wrench. In some cases it may be undesirable to use a longer wrench, such as when a workspace is limited in size, or when it would be undesirable to carry different sized wrenches.
Therefore, a need exists for a device that is capable to increasing a force applied to a fixation means without the need for a longer wrench.
SUMMARY OF THE INVENTIONAccording to an embodiment of the present invention, a tool comprises a drive gear comprising a hollowed interior portion, including teeth disposed on an inner wall, the drive gear comprising a drive member disposed on a bottom portion of the drive gear, the drive member for applying a first force, an intermediate gear cooperating with the teeth disposed inward, the intermediate gear having a fixed position within the drive gear, and a primary gear disposed within the drive gear, cooperating with the intermediate gear, the primary gear for receiving a second force less than the first force.
The primary gear is located at a center of the drive gear. The primary gear comprises a socket exposed to an exterior of the drive gear.
The drive gear further comprises a removable top portion.
At least one of the primary gear, the intermediate gear, and the teeth of the drive gear are removable.
The primary gear, the intermediate gear, and the drive gear are arranged on a horizontal plane.
BRIEF DESCRIPTION OF THE FIGURESPreferred embodiments of the present invention will be described below in more detail, with reference to the accompanying drawings:
Through the gearing of a hand tool, such as a wrench, additional leverage can be obtained on a fixation means, e.g., a bolt or a nut. Referring to
The drive gear 103 comprises teeth on the inside wall 104, cooperating with the intermediate gear 102. The primary gear 101 cooperates with the intermediate gears 102. While
In
Referring to
The intermediate gears 102 are rotate about fixed positions relative to the drive gear 103. The intermediate gears can be fixed by, for example, pins 201 fitting in corresponding holes of the drive gear or holes 202 corresponding to pins of the drive gear 103. Other means for positioning the intermediate gears are possible, such as walls within the drive gear 103.
As shown in
Referring to
According to an embodiment of the present invention, the gears 101-103 of the device 100 can be swapped out, allowing a user to change a gearing of the device 100. Referring to
It should be noted that while the drive gear 103 is depicted as having a round exterior shape, other shapes can be implemented, for example, a hexagon.
Having described embodiments for a device to increasing a force applied by the wrench, it is noted that modifications and variations can be made by persons skilled in the art in light of the above teachings. It is therefore to be understood that changes may be made in the particular embodiments of the invention disclosed which are within the scope and spirit of the invention as defined by the appended claims. Having thus described the invention with the details and particularity required by the patent laws, what is claimed and desired protected by Letters Patent is set forth in the appended claims.
Claims
1. A tool comprising:
- a drive gear comprising a hollowed interior portion, including teeth disposed on an inner wall, the drive gear comprising a drive member disposed on a bottom portion of the drive gear, the drive member for applying a first force;
- an intermediate gear cooperating with the teeth disposed inward, the intermediate gear having a fixed position within the drive gear; and
- a primary gear disposed within the drive gear, cooperating with the intermediate gear, the primary gear for receiving a second force less than the first force.
2. The tool of claim 1, wherein the primary gear is located at a center of the drive gear.
3. The tool of claim 1, wherein the primary gear comprises a socket exposed to an exterior of the drive gear.
4. The tool of claim 1, wherein the drive gear further comprises a removable top portion.
5. The tool of claim 1, wherein at least one of the primary gear, the intermediate gear, and the teeth of the drive gear are removable.
6. The tool of claim 1, wherein the primary gear, the intermediate gear, and the drive gear are arranged on a horizontal plane.
Type: Application
Filed: Aug 20, 2003
Publication Date: Feb 24, 2005
Inventor: Nathaniel Wallace (Beechhurst, NY)
Application Number: 10/644,144